KANGEAN BLOCKKANGEAN BLOCKNORTHEAST JAVA BASINNORTHEAST JAVA BASIN

Oleh :Oleh :

Aluwisia Juli H (26139)Aluwisia Juli H (26139)

Herning Dyah K W (26491)Herning Dyah K W (26491)

LOKASI LOKASI

Pembagian daerah secara geologi (geological province)

dan sumur pada blok Kangean (Phillips et al.,1991)

GEOLOGI REGIONALGEOLOGI REGIONAL

REGIONAL TECTONIC SETTINGREGIONAL TECTONIC SETTING• Pre tertiary Pre tertiary • TertiaryTertiary

Back arc basinBack arc basin Paleogene ekstensional riftingPaleogene ekstensional rifting Neogene compressional wrenchingNeogene compressional wrenching Plio- Pleistocene Compressing Plio- Pleistocene Compressing Thrust foldingThrust folding

REGIONAL REGIONAL STRATIGRAPHYSTRATIGRAPHY

Fase transgresi Eosen – Oligosen Fase transgresi Eosen – Oligosen AwalAwal

Fase Transgresi Oligosen Akhir – Fase Transgresi Oligosen Akhir – Miosen AwalMiosen Awal

Fase regresi Miosen TengahFase regresi Miosen Tengah Fase regresi Miosen Akhir - PliosenFase regresi Miosen Akhir - Pliosen

REGIONAL TECTONIC SETTING

(Manur, H. & Barraclough, R., 1994)

HIGH & LOW PATTERN

(Mudjiono R & Pireno G., 2001 dengan modifikasi)

LOCAL TECTONICLOCAL TECTONIC

Cretaceous subductingCretaceous subducting Cret. syncline Cret. syncline Paleocene/Eocene backarc extensionPaleocene/Eocene backarc extension

E – W Half grabenE – W Half graben Early – Middle Miocene N – S compressionalEarly – Middle Miocene N – S compressional

Uplift of Central HighUplift of Central High Late Miocene N – S compressionalLate Miocene N – S compressional

uplift & inversion half graben uplift & inversion half graben Pagerungan young anticline Pagerungan young anticline

Present day compressionalPresent day compressional

Tectonic Model of East Java – Biliton Basinal AreaTectonic Model of East Java – Biliton Basinal Area

(Purnomo J & Purwoko 1994)

FOUR DISTINCT FOUR DISTINCT STRUCTURAL PROVINCESSTRUCTURAL PROVINCES

Northern PlatformNorthern Platform Central highCentral high Kemirian TerraceKemirian Terrace Southern BasinSouthern Basin

Structural ProvinceStructural Province

Pembagian daerah secara geologi (geological province)

(Phillips et al.,1991)

BASIN CONFIGURATION Syn – rift : Paleocene – Mid. Eocene

Pre – Ngimbang :ss, shale, coalNgimbang Clastic :q ss-shale, coal

Rifting : EoceneNgimbang Carbonate

Sagging : Late EoceneNgimbang ShaleKujung Fm : carbonate, shalePrupuhFm : carbonateCepu Fm : shaleRancak Fm : carbonate

Inversion : Late Miosen Mundu Fm : shale

Paciran : carbonate Lidah : shale

LOCAL LOCAL STRATIGRAFI STRATIGRAFI

COLUMNCOLUMN

(Phillips et al.,1991)

Cross section of Northern PlatformCross section of Northern Platform

(Phillips et al.,1991)

PETROLEUM SYSTEMPETROLEUM SYSTEM

Source rock : Source rock : Clastic Pre –NgimbangClastic Pre –NgimbangClastic NgimbangClastic Ngimbang Pre Tersier (post mature) Pre Tersier (post mature)

Reservoar :Reservoar : NgimbangNgimbang : SS, Carbonate: SS, Carbonate PrupuhPrupuh : Carbonate: Carbonate Paciran Paciran : SS, Carbonate: SS, Carbonate

TrapTrap ::• Structural Structural :Pagerungan Anticline :Pagerungan Anticline• Stratigraphy :Carbonate (build up)Stratigraphy :Carbonate (build up)

SealSeal ::

NgimbangNgimbang Shale Shale

LIdahLIdah

Oil Migration :10 MA (Peak oil Ngimbang)Oil Migration :10 MA (Peak oil Ngimbang) 10 MA (10 MA (Peak gas Pre NgimbangPeak gas Pre Ngimbang))

Regional Tectonic SettingRegional Tectonic Setting

(Manur, H. & Barraclough, R., 1994)

Major Tectonic Framework In Western IndonesiaMajor Tectonic Framework In Western Indonesia

(Purnomo J & Purwoko 1994)

Regional StratigraphyRegional Stratigraphy

(Purnomo J & Purwoko 1994)

Seismic Cross Section Northern PlatformSeismic Cross Section Northern Platform

(Phillips et al.,1991)